Nanoparticle X-Ray MRI Contrast Agent for Deep Tissue Imaging
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Solution Overview
Problem
Current imaging technologies, such as optical microscopy, CT, and MRI, face limitations in spatial and temporal resolution, especially in deep tissue imaging, and struggle to provide accurate localization information in complex biological systems.
Innovation Solution
The use of nanoparticles, such as nanophosphors, that can be excited by radiation like UV or X-rays, altering their resonance parameters, allowing for enhanced MRI imaging by measuring changes in T1, T2, and T2* relaxation times, which provides long-term dynamic contrast and localization information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical imaging methods such as microscopy are used, then high spatial resolution is achieved, but imaging depth is limited due to diffusive properties of optical light
Solution Approach 1:
The patent combines CT excitation capability with MRI detection capability through the use of nanoparticles that respond to both modalities. The nanoparticles are excited by X-rays (CT modality) and subsequently detected by MRI, merging the advantages of both imaging techniques to achieve deep tissue imaging with high spatial resolution.
Solution Approach 2:
Nanoparticles serve as an intermediary between CT and MRI modalities. They absorb X-ray energy and convert it to a detectable MRI signal, enabling the transfer of information from deep tissue regions (accessible by CT) to the high-resolution MRI detection system.
2Length of stationary object
If CT imaging is used to achieve deep tissue penetration, then imaging depth is improved, but spatial and temporal resolution deteriorates
Solution Approach 1:
The patent merges CT's deep penetration capability with MRI's high spatial and temporal resolution. The nanoparticles are excited by X-rays (providing deep tissue penetration) and the resulting changes are detected by MRI (providing high resolution), thus combining the strengths of both modalities.
3Length of stationary object
If conventional MRI is used for molecular imaging, then deep tissue imaging is achieved, but spatial and temporal resolution is limited
Solution Approach 1:
The patent introduces nanoparticles with localized functional properties to specific regions of interest. These nanoparticles have enhanced magnetic properties and can be targeted to specific molecular locations, providing localized high-resolution contrast that improves overall spatial and temporal resolution while maintaining deep tissue imaging capability.
4Reliability
If fluorescence-based imaging is used to achieve high specificity, then molecular functionality is improved, but imaging depth and spatial resolution deteriorate
Solution Approach 1:
The nanoparticles act as an intermediary that preserves the specificity of molecular targeting while enabling deep tissue imaging. The nanoparticles can be functionalized with targeting moieties for high specificity, and their X-ray excited MRI response enables deep tissue detection with high spatial resolution, overcoming fluorescence depth limitations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables high-resolution, targeted imaging with improved spatial and temporal resolution, overcoming the limitations of existing methods by using nanoparticles as a coupling mechanism between different imaging modalities, such as CT and MRI, allowing for deeper tissue penetration and more accurate biological imaging.
Implementation Method 1
Excitation with radiation, such as ultraviolet (UV) or X-ray radiation, can be performed on the nanoparticles to affect one or more resonance parameters of the nanoparticles
Implementation Method 2
when in a magnetic resonance imaging (MRI) machine, this change can be measured as a change in one or more resonance constants (for example, T1, T2, and/or T2*) of the nanoparticles
Data Source
AI summary
Imaging systems and methods are provided. Systems and methods of the subject invention can include the use of nanoparticles (for example, nanophosphors) within a sample to be imaged. Excitation with radiation, such X-ray radiation, can be performed on the nanoparticles to give rise to a change in one or more resonance parameters of the nanoparticles, and this change can be measured using magnetic resonance imaging to provide localization information.